Gu Ting had always known how possessive he was of Jiang Qianqian. He thought his older sister loved him too, but later discovered that Jiang Qianqian loved many people. He had only been given the most insignificant share of her love.
Jiang Qianqian had always understood Gu Ting's dependence on her and his affection for her. She thought her younger brother simply needed someone to look after him. Only later did she realize he was incapable of loving anyone, yet had given all his love to her.
Gu Ting: I want to be the only person my sister sees. If begging doesn't work, then I'll just have to use any means necessary to get what I want.
Jiang Qianqian: So if you want to date me, just say so. Are you acting like a dark, obsessive yandere because you want your big sister to teach you about love?
A mature, easygoing older sister x a seriously messed-up younger brother
Reading notes:
1. The heroine isn't a self-sacrificing saint. At first, she doesn't even want to deal with the hero.
2. The hero does end up going dark.
3. This could be classified as a salvation story, but the heroine never planned to be anyone's savior. Falling in love with the hero was just an accident.
Theme: Love is a repeated struggle between possession and letting go.